#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

int main()
{
	int a = 0;
	int* p1=&a;
	const int * p2;
	p2 = p1;


	int** p3=&p1;
	const int ** p4;
	p4 = p3;


	return 0;
}